Dimmer for electronic transformers, 230V halogen, incandescent and LED up to 300VA. Min. output 1VA. With stairway function. Complete with centerpieces knob adapted to Exxact, Elko and Gira. Also firs the Busch-Jaeger system together with included step-up adapter (4mm->6mm) inside. With self-resettable short-circuit protection. Automatic thermal and overload protection. Transient and surge protection up to 2kV.